First, I would disconnect the TV module and connect the blue plug directly to your nav computer. That will ensure that you are seeing only the nav during the upgrade. Since you have a Mono-coded unit, I would bounce back to an untouched V24, V25, or V26 version. That should officially load the monochrome OS. Then, try another upgrade with a V28 disk modified to load the color OS. Since your first attempt did not work, you may want to create a new modified V28 CD.

__________________
SOLD
2000 E38 750iL Highline Edition, Upgraded with the lastest 2006 X5 Electronics
MKIV Navigation, 16:9 Display, Bluetooth, TV/Video with Backup Camera, Sirius, and Aux Input